>> CRT file

CRT file format description

Many people share .crt files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .crt file can be edited, converted or printed with. On this page, we try to provide assistance for handling .crt files.

1 filename extension(s) found in our database.

.crt - Certificate File

The CRT other files are related to OpenSSL. The .CRT file contains the certificate, including the identity information, public key, expiry date, and signature.

Other files
- / -
Certificate File related extensions:
OpenSSL Certificate Authority Data
Certificate Signing Request
Certificate File
Key Database File
OCSP Request Data
PKCS #12 Data File

Naturally, other applications may also use the .crt file extension. Even harmful programs can create .crt files. Be especially cautious with .crt files coming from an unknown source!

Can't open a .crt file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .crt file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ct, cft, srt, cdt, rct, drt, ctr, cry, crh, crf, cgt, vrt, cet, rt, frt

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Silicon Graphics Iris Cliptexture
TIFF Contone File
Cheat Engine Cheat Table
ChiWriter Low-res Screen Font
Forth Source Code
Microsoft SQL Server Data Replication Conflict Tables

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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If you have useful information about the .crt file format, then write to us!

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